An algorithm for computations of the power deposition in human tissue

Author

Caputa, K. ; Okoniewski, Michal ; Stuchly, Maria A.

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

41

Issue

4

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

102

Lastpage

107

Abstract

The finite-difference time-domain (FDTD) is the most often used method for evaluation of electromagnetic fields in human tissue. This is of particular importance for compliance testing of portable telephones. The specific absorption rate (SAR) averaged over 1 or 10 g tissue mass is required by regulations not to exceed a prescribed value. A computer algorithm is developed for post-processing the FDTD data. This algorithm can be used for uniform as well as graded meshes, while the required cubical shape is maintained. Extensive investigations are shown of the resultant SAR due to the number of electric field components used in field averaging, and the volume of air within the cube. The latter is easily controlled in the algorithm, but the regulations on the permissible SAR do not specify it at the present time

Keywords

biological effects of microwaves; biological tissues; conformance testing; electromagnetic wave absorption; finite difference time-domain analysis; health hazards; land mobile radio; telecommunication equipment testing; FDTD; SAR; compliance testing; cubical shape; electric field component; field averaging; finite-difference time-domain; graded mesh; human tissue; portable telephones; power deposition; specific absorption rate; uniform mesh; Biological tissues; Europe; Finite difference methods; Guidelines; Humans; Power distribution; Shape; Specific absorption rate; Telephony; Time domain analysis;

fLanguage

English

Journal_Title

Antennas and Propagation Magazine, IEEE

Publisher

ieee

ISSN

1045-9243

Type

jour

DOI

10.1109/74.789742

Filename

789742